3h7x

From Proteopedia

(Difference between revisions)

Revision as of 01:24, 5 August 2016

A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the wildtype structure

Structural highlights

3h7x is a 6 chain structure with sequence from "bacterium_enterocoliticum"_schleifstein_and_coleman_1939 "bacterium enterocoliticum" schleifstein and coleman 1939. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	3h7z
Gene:	yadA ("Bacterium enterocoliticum" Schleifstein and Coleman 1939)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[YADA2_YEREN] Collagen-binding outer membrane protein forming a fibrillar matrix on the bacterial cell surface. Promotes initial attachment and invasion of eukaryotic cells. Also protects the bacteria by being responsible for agglutination, serum resistance, complement inactivation and phagocytosis resistance.^[1] ^[2]

Publication Abstract from PubMed

Trimeric autotransporter adhesins (TAAs) represent an important class of pathogenicity factors in proteobacteria. Their defining feature is a conserved membrane anchor, which forms a 12-stranded beta-barrel through the outer membrane. The proteins are translocated through the pore of this barrel and, once export is complete, the pore is occluded by a three-stranded coiled coil with canonical heptad (7/2) sequence periodicity. In many TAAs this coiled coil is extended by a segment of varying length, which has pentadecad (15/4) periodicity. We used X-ray crystallography and biochemical methods to analyze the transition between these two periodicities in the coiled-coil stalk of the Yersinia adhesin YadA. Our results show how the strong right-handed supercoil of the 15/4-periodic part locally undergoes further over-winding to 19/5, before switching at a fairly constant rate over 14 residues to the canonical left-handed supercoil of the 7/2-periodic part. The transition region contains two YxD motifs, which are characteristic for right-handed coiled-coil segments of TAAs. This novel coiled-coil motif forms a defined network of inter- and intrahelical hydrogen bonds, thus serving as a structural determinant. Supercoil fluctuations have hitherto been described in coiled coils whose main sequence periodicity is disrupted locally by discontinuities. Here we present the first detailed analysis of two fundamentally different coiled-coil periodicities being accommodated in the same structure.

A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled-coil segment of trimeric autotransporter adhesins.,Alvarez BH, Gruber M, Ursinus A, Dunin-Horkawicz S, Lupas AN, Zeth K J Struct Biol. 2010 May;170(2):236-45. Epub 2010 Feb 21. PMID:20178846^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Roggenkamp A, Ackermann N, Jacobi CA, Truelzsch K, Hoffmann H, Heesemann J. Molecular analysis of transport and oligomerization of the Yersinia enterocolitica adhesin YadA. J Bacteriol. 2003 Jul;185(13):3735-44. PMID:12813066
↑ Emody L, Heesemann J, Wolf-Watz H, Skurnik M, Kapperud G, O'Toole P, Wadstrom T. Binding to collagen by Yersinia enterocolitica and Yersinia pseudotuberculosis: evidence for yopA-mediated and chromosomally encoded mechanisms. J Bacteriol. 1989 Dec;171(12):6674-9. PMID:2592347
↑ Alvarez BH, Gruber M, Ursinus A, Dunin-Horkawicz S, Lupas AN, Zeth K. A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled-coil segment of trimeric autotransporter adhesins. J Struct Biol. 2010 May;170(2):236-45. Epub 2010 Feb 21. PMID:20178846 doi:10.1016/j.jsb.2010.02.009

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3h7x"

@@ Line 1: / Line 1: @@
 ==A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the wildtype structure==
 <StructureSection load='3h7x' size='340' side='right' caption='[[3h7x]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3h7x]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Yersinia_enterocolitica Yersinia enterocolitica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3H7X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3H7X FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3h7x]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacterium_enterocoliticum"_schleifstein_and_coleman_1939 "bacterium enterocoliticum" schleifstein and coleman 1939]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3H7X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3H7X FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3h7z|3h7z]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">yadA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=630 Yersinia enterocolitica])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">yadA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=630 "Bacterium enterocoliticum" Schleifstein and Coleman 1939])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3h7x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h7x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3h7x RCSB], [http://www.ebi.ac.uk/pdbsum/3h7x PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3h7x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h7x OCA], [http://pdbe.org/3h7x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h7x RCSB], [http://www.ebi.ac.uk/pdbsum/3h7x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3h7x ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3h7x" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Adhesin|Adhesin]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Yersinia enterocolitica]]
+[[Category: Bacterium enterocoliticum schleifstein and coleman 1939]]
 [[Category: Hernandez-Alvarez, B]]
 [[Category: Lupas, A N]]

3h7x

From Proteopedia

Revision as of 01:24, 5 August 2016

A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the wildtype structure

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox